# Relationship history for MSHA mine 3401801

Current hierarchy: **Wienerberger AG → General Shale Brick, Inc. → Robinson Brick Mine No.1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** F George  Robinson Jr → Robinson Brick Mine No.1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Donaho Stone → Robinson Brick Mine No.1; 1997-07-01 to 2005-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Don M  Donaho et al → Robinson Brick Mine No.1; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don M  Donaho et al → Donaho Stone; 1997-07-01 to 2005-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Robinson Brick Mine No.1; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Robinson Brick Company → Robinson Brick Mine No.1; 2005-06-30 to 2008-03-12; source msha-controller-operator-history
- **controller_controls_operator:** F George  Robinson Jr → Robinson Brick Company; 2005-06-30 to 2008-03-12; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Robinson Brick Mine No.1; 2008-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → General Shale Brick, Inc.; 2008-03-13 to current/open; source msha-controller-operator-history